Cited by 109Genetics and Neurodevelopmental DisordersGenetic Neurodegenerative DiseasesNeurological disorders and treatments

Tremor and ataxia in fragile X premutation carriers: Blinded videotape study

Berry‐Kravis, Elizabeth, Lewin, Foster, Wuu, Joanne, Leehey, Maureen, Hagerman, Randi, Hagerman, Paul, Goetz, Christopher G.·2003·Annals of Neurology

Abstract

Fragile X premutation carriers do not have typical fragile X syndrome (FXS) although late‐onset progressive action tremor and gait disorder with CNS atrophy was recently reported in male carriers. We compared tremor, gait disorder and parkinsonian signs in FXS premutation subjects (age 50 or more) and a similar control population, using a standardized videotaping protocol. Videotapes were rated using standard scales for tremor (CRST), ataxia (ICARS), and parkinsonian signs (UPDRS) by an investigator blinded to premutation status. Compared to all other groups pooled (n = 30), the male premutation carrier group (n = 7) had significantly higher scores on the CRST (p = 0.0008), ICARS (p = 0.001), and UPDRS (p = 0.0094). On the CRST, rest, postural and kinetic tremor scores were all higher in the male carriers. The elevated total UPDRS and ICARS scores mainly resulted from markedly higher scores for tremor and limb ataxia, respectively. The female carrier (n = 14) and control groups (n = 8) did not differ on any measure. The FMR1 premutation is associated with increased levels of CGG repeat‐containing FMR1 mRNA, which may predispose to these symptoms by interfering with nuclear mechanisms. Given the relatively high population frequency of the FMR1 premutation, this mutation may be a significant cause of late‐onset “idiopathic” progressive tremor. Ann Neurol 2003

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Authors
Berry‐Kravis, E., Lewin, F., Wuu, J., Leehey, M., Hagerman, R., Hagerman, P., & Goetz, C. G.
Affiliations
  • Rush University Medical Center (US)
  • University of California Davis Medical Center (US)
Corresponding author
Berry‐Kravis, Elizabeth
Venue
Annals of Neurology
Publisher
Wiley
Published
2003-03-28
Volume
53
Issue
5
Pages
616-623
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2059514979
Cited by
109
References
33
Citations by year
2026: 1 · 2025: 3 · 2022: 1 · 2021: 4 · 2020: 6 · 2019: 3 · 2016: 3 · 2014: 4 · 2013: 5 · 2012: 5
FWCI
6.52
Type
journal article
Language
en
Open access
closed
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Neurological Disorders and Stroke (R01NS043532, NS 43532)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
fragile X premutation, FMR1 gene, action tremor, ataxia, parkinsonian signs, gait disturbance, CGG repeat expansion, FMR1 mRNA, sex differences, male carriers
MeSH terms
Aged, Ataxia, Atrophy, Central Nervous System, DNA Mutational Analysis, Female, Fragile X Syndrome, Heterozygote, Humans, Male, Middle Aged, RNA, Messenger, Tremor, Videotape Recording, Point Mutation

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